.usuarios-css {
  display: inline-block;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  cursor: pointer;
  padding: 45px 20px 10px;
  border: 1px solid #018dc4;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  font: normal normal normal 12px/normal Verdana, Geneva, sans-serif;
  color: rgba(255,255,255,0.9);
  -o-text-overflow: clip;
  text-overflow: clip;
  background: url("http://enjoycss.com/bg-img/custom/17282-7t9yiq.png"), -webkit-linear-gradient(-90deg, rgba(198,224,148,1) 0, rgba(124,188,10,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-7t9yiq.png"), -moz-linear-gradient(180deg, rgba(198,224,148,1) 0, rgba(124,188,10,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-7t9yiq.png"), linear-gradient(180deg, rgba(198,224,148,1) 0, rgba(124,188,10,1) 100%);
  background-repeat: no-repeat, repeat;
  background-position: 50% 30%, 50% 50%;
  -webkit-background-origin: padding-box;
  background-origin: padding-box;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-background-size: auto auto;
  background-size: auto auto;
  -webkit-box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  text-shadow: -1px -1px 0 rgba(15,73,168,0.66) ;
  -webkit-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  width:70px;
}

.professores-css {
  display: inline-block;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  cursor: pointer;
  padding: 45px 20px 10px;
  border: 1px solid #018dc4;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  font: normal normal normal 12px/normal Verdana, Geneva, sans-serif;
  color: rgba(255,255,255,0.9);
  -o-text-overflow: clip;
  text-overflow: clip;
  background: url("http://enjoycss.com/bg-img/custom/17282-1wnrsow.png"), -webkit-linear-gradient(-90deg, rgba(74,134,232,0.4) 0, rgba(74,134,232,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-1wnrsow.png"), -moz-linear-gradient(180deg, rgba(74,134,232,0.4) 0, rgba(74,134,232,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-1wnrsow.png"), linear-gradient(180deg, rgba(74,134,232,0.4) 0, rgba(74,134,232,1) 100%);
  background-repeat: no-repeat, repeat;
  background-position: 50% 30%, 50% 50%;
  -webkit-background-origin: padding-box;
  background-origin: padding-box;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-background-size: auto auto;
  background-size: auto auto;
  -webkit-box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  text-shadow: -1px -1px 0 rgba(15,73,168,0.66) ;
  -webkit-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  width:70px;
}

.amigos-css {
  display: inline-block;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  cursor: pointer;
  padding: 45px 20px 10px;
  border: 1px solid #018dc4;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  font: normal normal normal 12px/normal Verdana, Geneva, sans-serif;
  color: rgba(255,255,255,0.9);
  -o-text-overflow: clip;
  text-overflow: clip;
  background: url("http://enjoycss.com/bg-img/custom/17282-wui2c3.png"), -webkit-linear-gradient(-90deg, rgba(224,102,102,0.2) 0, rgba(224,102,102,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-wui2c3.png"), -moz-linear-gradient(180deg, rgba(224,102,102,0.2) 0, rgba(224,102,102,1) 100%);
  background: url("http://enjoycss.com/bg-img/custom/17282-wui2c3.png"), linear-gradient(180deg, rgba(224,102,102,0.2) 0, rgba(224,102,102,1) 100%);
  background-repeat: no-repeat, repeat;
  background-position: 50% 30%, 50% 50%;
  -webkit-background-origin: padding-box;
  background-origin: padding-box;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-background-size: auto auto;
  background-size: auto auto;
  -webkit-box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  text-shadow: -1px -1px 0 rgba(15,73,168,0.66) ;
  -webkit-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  width:70px;
}